.pop {
 z-index: 10000;
 display:none;
 position:fixed;
 top:-50px;
 left:0;
 width:100%;
 height:145%;
}



.pop > span {
 cursor:pointer;
 position:absolute;
 top:460px;
 right:3%;
 -webkit-border-radius:100px;
 -moz-border-radius:100px;
 border-radius:100px;
 background: #000;
 padding:20px 22px 20px 22px;
 width:55px;
 height:55px;
}

iframe {
  height: 73%;
  margin: 0 auto 0 auto;
}